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J.Zhang , D.X. Zou , Z.Z. Zhang and Z. Y Zhong(Central Iron & Steel Research Institute , Beijing 100081 , China Manuscript received 26 August 1996)
金属学报(英文版)
The metallographic observation and analyses of TiAl alloy cast ingots revealed that the preferably arranged γ/α_2 lamellar microstructure can be obtained in columnar dendritic cast ingot through controlling the Ti/Al atomic ratio. The experiments conf irmed that the preferably arranged γ/α_2 lamellar microstructure has excellent tensile strength and fracture toughness and tolerant tensile plasticity when the stress is applied parallel to the γ/α_2 interface.Based on these results and the working condition of the turbine blades,a component-specific alloy design has been suggested.
关键词: : TiAl intermetallics , null , null
